* for dealing with serial devices at the OS level; this is exposed through the
* termios API and dates to the days when serial terminals were common. If your
* code relies on many of these facilities you will need to adapt it, because
* for dealing with serial devices at the OS level; this is exposed through the
* termios API and dates to the days when serial terminals were common. If your
* code relies on many of these facilities you will need to adapt it, because